Carburetor attachment



Aug 23, 1932- A. LAURENCICH 1,872,762

CARBURETOR ATTACHMENT Filed NOV. 7. 1950 2 Sheets-Shet l ug'. 23, 1932. .A LAURENClCH 1,872,762

CAR'BURETOR ATTACHMENT Filed'` Nov. 7. 1930 2 Sheets-Sheet 2 A TTORNE Y.

Patented Aug. 23, 1932 w UNITED *ST-Ares PATENT' OFFICE Aarnun AURENcIcir, on wAsnIimmoNDisTaior `o1v coLUiviBIA cARBURnToR Application filed; November gases, under these conditions inrthe cylinder and exhaustV manifold.

' A further object is to provide a valve in the carburetor for controlling thev flow of fluid under suction 'into the -intake` manifold, which valve is slidably mounted 'in a sleeve threaded into the carburetor casing,

and having at its outer lend a bead an'd a head on the valve connected to a push rod, and provided with a leafspring having a shoulder adapted to spring over the beadv for holding the valve in opened or closed positions. f

A. further object is to provide means whereby the leaf detent spring may have its shouldered end adjusted to various positions, thereby allowing a fine adjustment of the tapered end of the valve in relation to the valve seat, as well as the position of the head in relation to the threaded sleeve. Also to provide a single set screw extending through the head for holding the push rod in the head and through an elongated slot in the leaf spring, and provided .with a lock nut 'for holding the spring, Vafteran adjustment thereof. i i i A ,further objectis to provide avalve for controlling'the flow of fuel sucked' through a port into the intake manifold, ,and'means in connection With said valve Whereby it may be adjusted to various positions in relation to the seat, and moved from said position to a closed position when it is desired to drag the engine when going down an incline, and at the same time avoid sucking fuel into the cylinders of. the engine.

A further object is to'V provide" means whereby the control valve may be Controlled from a position adj acent the steering wheel, and within easy reach of the operator, w

ATTACHMENT 7; 1930. Serial N'o. l.'=9l=,147.`v

A further object is tov provide a controllable valve, remotely Controlled, which may be applied to a conventionalform of carburetor by removing the high speed needle valve from the carburetor, thereby obviating modifying construction of the* carburetor. V v

VVith thevabove and other objects in view the invention resides in the combination and 'arrangeinent of parts as hereinafter set forth, shown in the drawings, described and claimed, it being understood that changes in the precise embodiment of theinvention maybe made without departing theclaims f a v- Inthe drawings:

lFigure 1` is a side elevation of a conventional form of automobile showing the device applied thereto.

F igure 2 is a side elevation of'a conventional form of carburetor, partly broken away and showing the controllable Valve applied thereto; o

'Figure 3 is a Vertical longitudinal sectional view through al portionv ofrthe carburetor and Valve in closed position.

Figure 4 is a view similar to Figure 3, but showing the valve in open position.

from-the scope of Figure 5 is a perspective view of the detent spring.V

.Figure 6 is a Vertical longitudinal sectional view through a portion of a carburetor, showing the control valve, as well as the high speed valve for controlling ports in the carburetor.

Figure 7 is a side elevation of a modified formv of control valve, showing a double bead4 on the threa'ded sleeve. i

Figure 8 is a Vertical longitudinal sectional view through the control valveshown in Figcountry where there are steep grades to drag the engine while the vehicle is in gear, thereby utilizing the compression in ,the cylinders as a brake for the vehicle, however in carburetors as atv present constructed, during this operation, gases are sucked into the cylin-l off, yet the sp ark may remain on, so that when' the bottom of the hill is reached, the momentum of the vehicle will suck in fuel when the valve' is open, thereby allowing the vehicle to proceed under the power of the engine. During the dragging of the engine, the rear drive Wheels 6 drive the propeller shaft 7 through'a conventional diiferential 8, transmission 9, clutch 10 to the usual crank shaft 11 of the engine, therefore it will be seen that when the gear shiftlever 12 is in any of its positions, other than neutral, there is a gear and shaft connection to theengine.

' TheA control valve is pref'erably installed in the threaded opening '13 Vfrom which the usual high speed needle valve has 'been removed. The usual high speed needle valve 5a is adj usted in relation to the port 5 to allow a predetermined amount of fuel to be sucked through the port on the intake stroke of the pistons of the engines, however no' means is provided for remotely controlling this valve for entirely Cutting off the flow of fuel through the port 5, and to accomplish this result a fiexible tube 14 is provided which may lead from any position adj acent the steering wheel 15 or the instrument board`16, and for purposes of illustration is shown clamped at 1,7 to the steeringcolumn 18'. The flcxible tube 14 extends forwardly and may be clamped by means of cleats 19 at stationary points on the engine, and extends downwardly and terminates adjacent the-Garburetor 3. i -Extending through the fiexible member 14 is a flexible control rod 20, which is anchored in a sleeve 21 by means of a set screw 22, and also anchored in the sleeve 21 by means of a set screw 23 is the upper reduced end 2a of the needle valve stem 25. Secured to one side of the sleeve 21 by means of a nut 26 on the. set screw 22 is a leaf detent spring 27, having a bifurcation 28, through which the set screw 22 extends, thereforel it will be seen that a single screw 22 is utilized for anchoring the fieXiblepush rod 20 in the sleeve 21, and adjustably mounting the leafspring 27, whereby its shoulder 29 may be adjusted accurately in relation to the annular rib 30 on the upper end of the bushing 31, which is threaded into the carburetor 2 at 13.

Under ordinary running conditions. the

valve 25 is unseated from its seat 32 for allowing the proper feeding of fuel to the intake manifold 2, and at which time the parts are in the position shown in Figure a. If the operator comes to a steep incline he imparts a push on the knob 33, which will impart a push on rod 20,,which in turn will force the valve 25 to closed position, as shown in Figure 3, and during which operation the shoulder 29 of the leaf spring detent 27 will spring over the rib 30 of the'sleeve 31, and will hold theneedle valve 25 seated, therefore it will be seen that 'during the dragging of the engine through the rearwheels 6, differential 8, propeller shaft 7, transmission 9, clutch 10 and Crank shaft 11, the enginewill be utilized as a brake without the danger of accumulating gases within the cylinder, and with-- out the necessity of cutting ofi1 the spark or ignition system to prevent explosion of these gases. It has been found there is a considerable saving in fuel, and the danger of an explosi-on is obviated.

i It will be noted that the device has also the advantages of the high speed necdle valve, and by referring to Figure 11, it will be seen by'adjusting the sleeve 31, the advantages o'f the high speed needle valve areobtained, in addition to the Cutting off feature.

Referring to Figure 6, the device is shown adjacent a high speed needle valve for use where it is desired to use both valves, however the operation is the same, as in the other forms.

i Referring to Figures 7 and 8, a modified form of valve 1s shownwherem an additional rib 30a is provided for positively holding the sleeve 21 in its outer position as shown in Figure 7, and in this form the leaf spring 27 is provided with a right angularly shaped arm 34, which cooperates with the rib 30a. The spring is provided with an angularly disposed arm 35, which will easily slide over the rib 30.

From the above it will be seen that a controllable valve is provided Controlled from i' acent the steering wheel whereby the passage of fuelfrom the carburetor bowl to the intake manifold may be Controlled or entirely cut off, thereby allowing the enginei'to be dragged down steep inclines without the danger of explosion within the engine from accumulated gases and conserving fuel. It will also be seen it will not be necessary to cut off the ignition system, consequently when is understood the operator has his clutch 10 in clutched position.

It is obvious that the i .so

The invention having been set forth what' is claimed as new and useful is:

1. The combination with an intake port connecting a carburetor bowl and an intake pipe, of a slidable needle Valve extending into said port and forming means whereby the flow of fuel through said port may be regulated or entirely cut ofi' and vdetent means cooperating with said needlev Valve Whereby said Valve is held in open or closed positions, said Valves being immediately returnable to original adjusted open position.

2. The combination with an intake port connecting a carburetor bowl and an intake pipe, and through which fuel is sucked to the intake pipe, of a slidabrle needle Valve extending into said port, a sleeve in which said w needle valve is slidably mounted, said Valve extending beyond the sleeve, a member into which said valve axially eXtends, a set screw for holding said Valve in said member, a push rod eXtending into said member, a set screw extending into said member and holding the push rod, a spring detent member held by said last named screw, a shoulder carried by said spring detent and a rib carried by the sleeve and positioned whereby when the valve is in open regulated position said shoulder will be on one side of said rib, and when in closed position on the opposite side of said rib, said valve being immediately returnable to original 'open regulated position.

3. The combination with a push Valve for controlling the passage of fuel from a carburetor to an intake pipe, of means for moving said Valve, said means comprisiIi-g a threaded sleeve in which the Valve is slidably mounted, said Valve extending beyond the threaded sleeve, a member carried by said valve beyond the sleeve and spaced therefrom, a push rod carried by the member, a spring detent carried by one side of the meinber, a set screw extending through a recess in the spring and clamping the push rod to the member, a bead carried by the sleeve, a shoulder carried by the spring and adapted to spring to opposite sides of the bead for holding the Valve in open or closed positions and means for limiting the movement of the Valve towards open position.

4. The combination with a carburetor needle valve controlling the fiow of fuel from the carburetor to an intake manifold, said Valve being regulated in open position, a sleeve in which said needle valve is slidably mounted, a movable member carried by the needle Valve to the outside of the sleeve, of spaced Shoulders carried by the sleeve, a leaf spring carried by the movable member and overlying one side of the sleeve, said leaf spring having a shoulder adapted to spring to opposite sides of the inner shoulder, the outer shoulder cooperating with the spring shoulder on movement of the Valve to open position for limiting the outward movement of the movable member and valve carried thereby to regulated open position.

5. The combination with ,an engine carburetor having a bowl, an intake pipe, a port connecting said bowl and pipe, a regulating valve extending into said bowl and port, of a second Valve extending into said port and remotely Controlled andV forming means, wher'eby the fiow of fuel in said port may be entirely cut'ofi' without moving the first mentioned valve and spring detent means for holding said valve in open' or closed positions.

6. The combination with a carburetor having a bowl, an intake pipe, a port connecting said bowl and pipe, a regulating Valve extending into said bowl and port, of a second valve extending into said port and remotely Controlled and forming means whereby the 'Il-ow of fuel in said port may be entirely cut off Without moving the first mentioned Valve and spring detent means for holding said second Valve in extreme open or closed positions. i

In testimony whereof he hereunto aflixes his signature.

ARTHUR LAURENCIGH. 

